.demo_box {
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

#ab {
    width: 100%;
    height: 180px;
    background-color: rgb(231, 237, 237);
    white-space: nowrap;
    overflow-y: auto;
}


.bom {
    display: flex;
    justify-content: space-between;
}

.bom .r{
    width: 500px;
    height: 200px;
    background-color: black;
    font-size: 30px;
    color: white;
    text-align: center;
    line-height: 200px;
}


.aaa {
    width: 100px;
    height: 150px;
    /* float: left; */
    display: inline-block;
    background-color: cornsilk;
}

.aaa1 {
    /* float: left; */
    display: inline-block;
}





.color1 {
    width: 100px;
    height: 100px;
    background-color: red;
}

.color2 {
    width: 50px;
    height: 50px;
    background-color: greenyellow;
}

.color3 {
    width: 150px;
    height: 50px;
    background-color: black;
}

.color4 {
    width: 50px;
    height: 100px;
    background-color: blue;
}

.color5 {
    width: 200px;
    height: 150px;
    background-color: orange;
}